World Summary ---Botswana

Summary information

Names
ISO3-Code	BWA
Continent	Africa
Country Name	Botswana
Administrative
Admin Level Used	1
Level1 Type	District
Number of Units	25
Population Estimates
Ref. Year First	19
Ref. Year Last	1991
Pop '90 (estimated) ('000)	1,287
Pop '95 (estimated) ('000)	1,455
Pop '90 (UN) ('000)	1,276
Pop '95 (UN) ('000)	1,474
Difference '90	-0.8 %
Difference '95	1.3 %
Spatial Estimates
Area (sq km)	600,370
Resolution (km)	155
PopPerUnit ('000)	59
Resources
Web Site	http://grid2.cr.usgs.gov

Data sources This database was initially produced for the UNEP/GRID-WRI-NCGIA Africa Population Database. See the GRID-Sioux Falls web site at http://grid2.cr.usgs.gov Pop data: Botswana Census of 1991, Digital file obtained through the Software Development Project, UN Statistics Division. Botswana Village Populations 1971, 81 and 91, Digital file obtained through the UNSD POPMAP project. Also contains district populations for the three census years. But did not contain the census figures for several urban areas for which 1991 populations were available from 1). UN Demographic Yearbooks for 1971 and 1973 (contain population for fewer aggregate districts) 71 and 81 pop for Gaborone and Francistown estimated using the inter-censal growth rates for Gaborone Town between 71-81 and 81-91 derived from the UN Urban Database. 71 and 81 pop for towns from the census list obtained from the UN Statistics Division's Software Development Pproject, but not included in the Botswana village publication were derived by using the overall Botswana inter-censal growth rates. Some adjustments were necessary because the census publications did not match the districts in the administrative units coverage obtained from EDC/SADC via the Univ. of Arizona. First the populations listed separately for urban areas were added to the corresponding districts. Next it was determined which district populations needed to be split into which units in the GIS coverage: Central Serowe/Palapye into Serowe and Palapye; Tuli population was estimated as a share of the Palapye; Machaneng and Bobonong populations; Kweneng into Kweneng South and North; Ngwaketse into Ngwaketse North Central and South; The shares were determined as follows: First the population of urban places in the districts obtained from 2) above were assigned to the correct districts (usually the coordinates were obtained from the Times Atlas and the district into which the place falls was determined using the GIS coverage). Next the residual population was split weighted by area; where this would make little sense due to the nature of the districts' terrain, uniform shares were used. P70-P90 obtained by using inter-censal growth rates between the three censuses for which data were available. P60 estimated by first calculating 1964-71 growth rates for aggregate districts as listed in 3). These rates were then applied for all new districts in each larger old district to obtain 1960 populations.

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